Why does my code not return? (Solved!)

Question

//my code

import java.util.Scanner;

public class Program {
public static void main(String[ ] args) {
Scanner sc = new Scanner(System.in);
int x = sc.nextInt();
System.out.print(Converter.toBinary(x));

}

class Converter {
public static toBinary() {
String binary="";

while(num > 0) {
binary = (num%2)+binary;
num /= 2;
}

return binary;

}

}
}

it just gives me this error:
/usercode/Program.java:12: error: invalid method declaration; return type required
public static toBinary() {
^
1 error

Answer 1

public static ____ toBinary(____)

In the first blank space, you need to declare what type of value should be returned from the method – in this case, a string.

In the second blank space, you need create a slot for passing your number as an argument to the method. In this case, probably int num

Answer 2

Yes, put your Converter class outside of the Program class

Answer 3

Thank you for your response, however:

I get this message after adding the String and int num:

/usercode/Program.java:12: error: Illegal static declaration in inner class Program.Converter
public static String toBinary(int num) {
^
modifier 'static' is only allowed in constant variable declarations
1 error

I tried adding "final" after "public static" but it continues to show that message.

Answer 4

Never mind! I realized I put the class Converter inside the public class Program. Thank you!